Vernier GW-TEMP Quick Start Manual
Vernier Go Wireless® Temp
Order Code GW-TEMP
The Vernier Go Wireless Temp is a rugged,
general-purpose, wireless temperature sensor
that you can use just like a thermometer. Its
durability, temperature range, and wireless
capability make it perfect for a variety of uses,
including:
Science fair projects
Monitoring environmental conditions
Monitoring the temperature in your
fish tank or greenhouse
Measuring the efficiency of a
Thermos™
Measuring the temperature of the air
coming from your air conditioner or
furnace
What is Included with Go Wireless Temp
Go Wireless Temp
USB Charging Cable
Quick-start guide
Graphical Analysis app (free download from the App Store or Google Play)
Charging Go Wireless Temp
Connect Go Wireless Temp to the included USB Charging Cable and any USB
device for two hours.
You can also charge up to eight Go Wireless Temp probes using our Go Wireless
Charging Station, sold separately (order code: GW-CRG). An LED on each Go
Wireless Temp indicates charging status.
2
Supported Devices
Go Wireless Temp can be used with a supported Bluetooth® Smart Ready mobile
device* running one of our apps.
iPad
®
(3rd generation or newer), iPad mini™, and iPad Air®
iPhone
®
(4S or newer)
iPod
®
touch (5th generation or newer)
LabQuest 2 (for support requirements, see www.vernier.com/til/3134/)
For Android
™
devices, see www.vernier.com/ga-app
Data-Collection Apps
Go Wireless Temp can be used with one of the following apps:
Graphical Analysis for iOS devices (version 2.0 or newer)
Available as a free download on the App Store, use this app for advanced data
collection and analysis. For more information, see www.vernier.com/ga-app
Graphical Analysis for Android (version 2.0 or newer)
Available as a free download on the Google Play, use this app for advanced data
collection and analysis. For more information, see www.vernier.com/ga-app
LabQuest 2 app (version 2.3.1 or newer)
For more information, see www.vernier.com/labq2
NOTE: Vernier products are designed for educational use. Our products are not
designed nor are they recommended for any industrial, medical, or commercial
process such as life support, patient diagnosis, control of a manufacturing process, or
industrial testing of any kind.
Specifications
Temperature range –40 to 125°C (handle: –10 to 45°C)
Maximum temperature that the sensor
can tolerate without damage
150°C
Minimum temperature that the sensor
can tolerate without damage:
–55°C
Resolution 0.07°C
Accuracy ±0.5°C
Response time 20 s (to 90% of full reading in water)
Maximum wireless range 30 m unobstructed
Warning
Do not put in flame.
*
For a full list of supported mobile devices, see www.vernier.com/ga-app
3
How Go Wireless Temp Works
This probe uses a solid state temperature sensor, located at the tip of the probe, to
measure temperature. The sensor outputs a count with each increment of the count
representing 0.0625C. This information is passed to the host application over the
wireless connection.
Go Wireless Temp has one button and three LEDs.
Button
Press the button once to turn on Go Wireless Temp. A red LED indicator
flashes when the unit is on.
Press and hold the button for more than three seconds to put Go Wireless Temp
into sleep mode. The red LED indicator stops flashing when sleeping.
Press and hold the button for more than eight seconds to reset the system. This
should not be necessary in normal operation.
Blue LED
Indicates charging status when Go Wireless Temp is connected to the Charging
Cable or Charging Station.
On – charging in progress
Off – charging is complete
Red LED Flashing
Indicates Go Wireless Temp is awake and ready to connect.
Green LED Flashing
Indicates Go Wireless Temp is connected and taking data.
Red and Green LED Off
Indicates Go Wireless Temp is in the lowest power sleep mode.
Collecting Data
Press the power button on Go Wireless Temp to turn it on. The LED on Go Wireless
Temp will flash red.
Collecting Data with Graphical Analysis App
1. Open Graphical Analysis.
2. Tap Create Experiment and choose Wireless Sensors.
3. Select Go Wireless Temp from the list of available sensors. When paired with the
software, the LED on Go Wireless Temp will flash green.
4. Collect data as desired.
Collecting Data with LabQuest 2 App
1. Choose New from the File menu.
2. On the Meter screen, choose Go Wireless Setup from the Sensors menu.
3. Select Go Wireless Temp from the list of available sensors. When paired with the
software, the LED on Go Wireless Temp will flash green.
4. Collect data as desired.
Calibration Information
There is not an option to calibrate Go Wireless Temp. Each device is carefully
calibrated as part of the manufacturing process.
4
Battery Information
Go Wireless Temp contains a small lithium-ion battery in the handle. The system is
designed to consume very little power and not put heavy demands on the battery.
Although the battery is warranted for one year, the expected battery life should be
several years. Replacement batteries are available from Vernier (order code:
GW-BAT-100).
Use only the Vernier Go Wireless Charging Cable or Go Wireless Charging Station
to charge the battery.
Storage and Maintenance of Go Wireless Temp
To store Go Wireless Temp for extended periods of time, put the device in sleep
mode by holding the button down for at least three seconds. The red LED will stop
flashing to show that the unit is in sleep mode. Over several months, the battery will
discharge but not be damaged. After such storage, charge the device for a few hours
and the unit will be ready to go.
Exposing the battery to temperatures over 35C (95F) will reduce its lifespan. If
possible, store Go Wireless Temp in an area that is not exposed to temperature
extremes.
Water Resistance
Go Wireless Temp can be submerged in water for limited periods of time. It has
been tested to a depth of 1 m for up to 30 minutes. However, submerging the sensor
impacts the radio operation by absorbing much of the energy. This may make it
difficult or impossible to connect to the sensor while submerged, particularly if there
are electrically noisy signals nearby such as pumps or motors.
Chemical and Water Tolerance
The metal shaft is constructed from grade 316
stainless steel.
‡
This high-grade stainless steel
provides a high level of corrosion resistance for
use in the science classroom. Here are some
general guidelines for usage:
The probe handle is constructed of molded
plastic. While this material is chemical
resistant, we recommend that you avoid
submerging the probe beyond the stainless
steel portion in anything but water.
Always wash the probe thoroughly after use.
The probe shaft can be left continuously in
water at temperatures within the range of
–40C to 125C. Continuous usage in
saltwater will cause only minor discoloration
of the probe shaft, with no negative effect on
performance.
‡
Grade 316 stainless steel has a composition of 0.08% carbon, 2.0% manganese, 0.75% silicon, 0.04%
phosphorus, 0.03% sulfur, 16-18% chromium, 10-14% nickel, 2-3% molybdenum, and 0.1% nitrogen.
Maximum acid exposure time
1 M HCl 20 min
2 M HCl 10 min
3 M HCl 5 min
1 M H2SO4 48 hours
2 M H2SO4 20 min
3 M H2SO4 10 min
1 M HNO3 48 hours
2 M HNO3 48 hours
3 M HNO3 48 hours
1 M CH3COOH 48 hours
2 M CH3COOH 48 hours
3 M CH3COOH 48 hours
1 M H3PO
4
48 hours
2 M H3PO4 48 hours
3 M H3PO4 48 hours
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